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EOC Biology Practice 9A
Multiple Choice
Identify the choice that best completes the statement or answers the question.
____ 1. Which of the following does NOT describe a polymer?
a. Polymers are made of monomers.
b. Polymers are large molecules.
c. Polymers usually form by covalent bonding.
d. Polymers are broken down by the process of hydrogenation.
____ 2. What are the basic building blocks of proteins?
a. nucleic acids
c. amino acids
b. peptide bonds
d. glycerol and fatty acids
____ 3.
A diagram of a protein molecule is shown above. The units labeled “X” which bond
together to form the protein molecule are called —
a. amino acids.
c. monosaccharides.
b. fatty acids.
d. nucleotides.
____ 4. Which of the following macromolecules are a prominent part of animal tissues that function in
insulation, helping animals conserve heat?
a. Carbohydrates
c. Proteins
b. Lipids
d. Nucleic acids
____ 5.
The drawing below illustrates a small portion of the molecules that make up a
cell membrane.
The phospholipid molecules serve to
a. help cells recognize each other
b. allow glucose molecules into the cell
c. prevent the passage of certain molecules into the cell
d. line up amino acids for protein synthesis
____ 6. Which of the following is a primary function of a lipid?
a. To deliver messages between cells.
b. To assist in chemical reactions within cells.
c. To transport oxygen through the body.
d. To provide long-term storage of energy.
____ 7. Many plants have waxy coatings on some surfaces. This coating reduces water loss because it
is not water-permeable. This waxy coating is which of the following types of organic molecule?
a. carbohydrate
c. nucleic acid
b. lipid
d. protein
____ 8. Which of the following categories of organic molecules is correctly paired with one of its
functions?
a. nucleic acids—digest dead cells
b. lipids—give quick energy to cells
c. carbohydrates—store genetic information
d. proteins—provide structure in skin, hair, and nails
Completion
Complete each statement.
9. The smaller subunits that make up nucleic acids are ____________________.
Short Answer
10. Cardinals are birds that spend the winter in Maryland. Many people feed them sunflower
seeds during the winter months. Some of the carbohydrates in the cardinal’s diet come from
these seeds. Describe
· the building blocks of carbohydrates (9A)
· how the sunflowers produce carbohydrates (9C)
· how carbohydrates are used by living organisms (9A)
11. a. Name the chemical elements present in a protein.
b. What name is given to the sub-units which make up all proteins?
c. A protein molecule which is denatured, has
(a) split into smaller molecules
(b) changed its shape
(c) combined with another molecule
(d) been diluted..
12. i. What's the name of the bonds that hold amino acids together
ii.What type of chemical reaction occurs when two monosaccharides join to form a
disaccharide
iii. What type of chemical reaction occurs when a triglyceride is broken into glycerol and
fatty acid molecules.
iv. In which molecule would you find ester bonds?
EOC Biology Practice 9A
Answer Section
MULTIPLE CHOICE
1. ANS: D
NAT: C5 | G1
PTS: 1
STA: 9(A)
2. ANS: C
PTS: 1
NAT: C5 | G1 | G3
MSC: Bloom's Taxonomy: 1
3. ANS: A
PTS: 1
4. ANS: B
PTS: 1
5. ANS: C
PTS: 1
6. ANS: D
PTS: 1
7. ANS: B
PTS: 1
8. ANS: D
PTS: 1
DIF: B
OBJ: 6-8
MSC: Bloom's Taxonomy: 1
DIF: B
OBJ: 6-9
STA: 9(A) | 9(B) | 9(D)
COMPLETION
9. ANS: nucleotides
PTS: 1
DIF: B
STA: 9(A) | 9(B) | 9(D)
SHORT ANSWER
10. ANS:
OBJ: 6-9
NAT: C5 | G1 | G3
MSC: Bloom's Taxonomy: 1
This response contains evidence of a full and complete understanding of the question. The
supporting details are pertinent and complete and are used to provide an integration of ideas
regarding all aspects of the question. The student thoroughly describes the building blocks of
carbohydrates (made up of monosaccharides, or simple sugars; contain carbon, hydrogen, and
oxygen in the same 2:1 ratio as waters), and how carbohydrates are produced (photosynthesis,
in which sunlight, water, and carbon dioxides is used to produce sugar and oxygen; light energy
is absorbed and utilized to transfer electrons; trapped by the thylakoids in the chloroplasts;
creates ATP; used in the Calvin Cycle). The function of carbohydrates is also completely
discussed (carbohydrates are macromolecules that store and transfer energy; through cellular
respiration, where sugars, such as glucose, are broken down in increments to create a large
amount of ATP energy for use). A complete synthesis of information is evident and the use of
scientific terminology enhances this response (macromolecule; photosystem I; photosystem
II; thylakoids; chloroplasts; ATP; Calvin Cycle; cellular respiration; glucose).
PTS: 1
11. ANS:
a. Proteins contain the elements carbon, hydrogen, oxygen, nitrogen and sulphur.
b. All proteins are composed of sub-units called amino acids.
c. (b) A protein which is denatured has changed its shape.
PTS: 1
12. ANS:
i. peptide
ii. condensation
iii. hydrolysis
iv. lipid
PTS: 1